Eurotherm Q500 Data Sheet

ACTIONI/Q

®

Q500

Loop Powered Multi-Channel Isolator

Q500-1B00 (1 channel)

Q500-2B00 (2 channel)

Q500-4B00 (4 channel)

 Up to 4 Loop Isolators in a Single Package
 Prevents Ground Loops
 High Density DIN Rail Mounting

Description

The Q500 is a DIN rail mount, loop-powered isolator with single,
dual or quad (4) channel capability. Each channel accepts a 0­20mA or 4-20mA input and outputs a proportional 0-20mA or 4­20mA signal. The Q500 provides 1800VDC signal isolation from
input to output and channel to channel.

All ActionI/Q modules feature SnapLoc plug-in screw terminals for
easy installation and low Mean-Time-To-Repair (MTTR). Two or
more modules can slide together and interlock for solid, high
density mounting. This is accomplished by removing either the
foot or the adjacent unit's faceplate (for right-hand side or left­hand side mounting, respectively). The module to be attached will
easily slide on to the side of the mounted unit.

Application

Loop-powered isolators are used to isolate process signals trans­mitted between field instrumentation, Programmable Logic Con­trollers (PLC), Distributed Control Systems (DCS) and Data Acqui­sition Systems (DAS). Outputs from these systems can also drive
one or more isolator channels of the Q500. Field devices such as
flow, level or temperature transmitters can also drive a Q500
isolator channel. The 1800VDC isolation capability prevents
ground loops from causing errors in 4-20mA current signals and
can reduce susceptibility to Radio Frequency Interference (RFI).
Isolation also provides protection from high voltages and current
spikes which can damage expensive Supervisory Control And Data
Acquisition (SCADA) equipment, such as a PLC or DCS.

Provides up to 4 Isolated DC Current Outputs in

Proportion to the Input Currents

 SnapLocTM Plug-in Terminals
 ASIC Technology

Operation

The Q500 operates as a loop-powered isolator, with each channel
deriving its power from the input loop current, 0(4)-20mA. The
effective load of a Q500 isolator channel on a loop is 300 ohms
plus the output load resistance. For example, if the load on an
output of the Q500 is 500 ohms, then the current loop connected
to the input would need to drive 300 ohms plus 500 ohms (i.e. 800
ohms) at a maximum current of 20mA, or 800 ohms x 20mA which
equals 16.0V.

The Q500 is protected from reverse input polarity and output
short circuit. A span pot is provided for each channel in order to
calibrate the output to the load.

Calibration

1. Connect the input to a calibrated milliamp source. Connect the
output to the actual device or to a load (between
ohms) equivalent to the actual device. Monitor the output current
with a milliamp meter in series with the load or monitor the
voltage across the load.

2. Set the calibrator to 20mA and adjust the span potentiometer
for 20mA output.

3. Set the calibrator to 4mA and confirm that the output is 4mA.

100 and 500

Specifications

r

Input Range:

0(4) to 20mA, 30VDC max, each channel
Voltage Drop: 6V (300 ohms), plus output load

Output Range:

0(4) to 20mA,
Drive: 10V or 500 ohms maximum @ 20mA, 100 ohms minimum

Output Accuracy:

Better than

+0.2% of full-scale, including linearity, hysteresis and

repeatability, maximum

Linearity:

0.1% of span typical, from 4 to 20mA at 250ohm load

Stability:

o

C of span max. for full-scale and zero

±0.02%/

Load Regulation:

±0.1% of span, typical per 10 ohm change

Common Mode Rejection Ratio:

> 100dB (DC to 60Hz)

Isolation:

1800VDC, input to output and channel to channel.

ESD Susceptibility:

Capable of meeting IEC 801-2 level 3 (8kV)

Response Time:

50mSec typical, 100mSec max 10 to 90% (each channel)

Temperature:

o

Operating: -40 to 80

C (-40 to 176oF)

Storage: -40 to 80oC (-40 to 176oF)

Humidity (non-condensing):

25 to 95% (@40

o

C)

Wire Terminals:

Socketed screw terminals for 12-22 AWG

Weight:

0.34lbs

Agency Approvals:

CSA certified per standard C22.2 (File No. LR42272).
UL recognized per standard UL508 (File No.E99775).

Q500-1B Terminals

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2A )-(tuptuO1lennahC 2C detcennoCtoN
3A detcennoCtoN 3C detcennoCtoN
4A detcennoCtoN 4C detcennoCtoN
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6A detcennoCtoN 6C )+(tupnI1lennahC

Q500-2B Terminals

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1A )+(tuptuO1lennahC 1C detcennoCtoN
2A )-(tuptuO1lennahC 2C )-(tupnI2lennahC
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4A )+(tuptuO2lennahC 4C detcennoCtoN
5A )-(tuptuO2lennahC 5C )-(tupnI1lennahC
6A detcennoCtoN 6C )+(tupnI1lennahC

Ordering Information

Models & Accessories
Specify:

1. Model:

Q500-1B00, Single (1) Channel,
Q500-2B00, Dual (2) Channel, or
Q500-4B00, Quad (4) Channel

Loop-Powered Isolator

2. Accessories: (see Accessories)

Accessories

ActionI/Q modules mount on standard TS32 (model MD02) or TS35 (model
MD03) DIN rail. In addition the following accessories are available:

Q500-4B Terminals

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1A )+(tuptuO1lennahC 1C detcennoCtoN

2A )-(tuptuO1lennahC 2C )-(tupnI2lennahC

3A detcennoCtoN 3C )+(tupnI2lennahC
4A )+(tuptuO2lennahC 4C detcennoCtoN
5A )-(tuptuO2lennahC 5C )-(tupnI1lennahC

6A detcennoCtoN 6C )+(tupnI1lennahC

1B )+(tuptuO3lennahC 1D detcennoCtoN

2B )-(tuptuO3lennahC 2D )-(tupnI4lennahC

3B )+(tuptuO4lennahC 3D )+(tupnI4lennahC

4B )-(tuptuO4lennahC 4D detcennoCtoN

5D )-(tupnI3lennahC
6D )+(tupnI3lennahC

Dimensions

MD02 TS32 DIN rail
MD03 TS35 x 7.5 DIN rail

Printed on recycled pape

Action Instruments

Chessell

Eurotherm